Sr Energy Levels
Energy level diagram for neutral strontium. Doppler cooling transition shown in blue (461 nm), narrow-line cooling transition (689 nm) and clock transition (698 nm) shown in red.
- Science + Technology
Science + Technology
NPL maintains a wide portfolio of internationally visible research programmes that advances measurement science, underpins the SI system and supports various cross-disciplinary technologies.
- Commercial Services
Commercial Services
NPL's commercial services are built on 100 years of leadership in accuracy, innovation and scientific research. Experienced consultants and project managers draw upon a unique combination of industry know-how and world-leading scientific discovery to deliver real-world business solutions and enable innovation and secure competitive advantage.
- Educate + Explore
Educate + Explore
We strive to actively promote public awareness and appreciation of science and technology, particularly the importance of measurement and the role of NPL. Here you can find out more about the interesting things we do, science outreach activities you can get involved in or take a look at some of our educational resources.
- Measurement Network
- NMS Learning Zone
- View Full
Menu
National Physical Laboratory | Hampton Road, Teddington, Middlesex, TW11 0LW | Tel: 020 8977 3222